Metal halide, also known as mercury, is often used in microscopy because it has many discrete wavelength peaks, which complements the use of filters for fluorescence studies. Metal halide, xenon, and high-pressure sodium are more typically used in large-scale applications or in areas requiring a very bright source. The lighting sources now commonly used in machine vision are fluorescent, quartz halogen, LED, metal halide (mercury), and xenon.įluorescent, quartz halogen, and LED are the most widely used lighting types in machine vision, particularly for small- to medium-scale inspection stations. But what if the wrinkles were in a different place in the next pack on the line? In this circumstance, the wrinkles are not precluding a good barcode reading. The cellophane wrappers on packs of note cards shows the left meets all three acceptance criteria whereas the right meets only criteria one and two.
0 Comments
Leave a Reply. |